Иможно подробное объяснение. 1. they (to be married) for three years. 2. he (to be) at home for ten minutes. 3. he can't stand up because he (drink) too much. 4. i (often/be) to scotland. 5. i (to work) for three years in that firm. 6. the united states (to have) a new president since october. 7. he (to stop/just) smoking. 8. (to take/ever/you) a plane? 9. look at the mouse! what (to happen) to it? 10. how long (to know/they) each other? 11. i (always/to want) to become a pianist. 12. they (to live) in france for five years
2.I don't feel good today. If I felt better, I would take a walk in the park today.
3.I have a cold today, but I will probably feel better tomorrow. If I feel better tomorrow, I will go to class.
4.I'm sorry that you didn't come to the party. If you had come, you would have had a good time.
5.I didn't know that Bob was sick. If I had known that he was sick, I would have taken him some chicken soup.
6.I'm tired. If I were not tired, I would help you.
7.Snow is predicted for tomorrow. If it snows tomorrow, I will stay home.
8.I may have a dollar. Let me look in my wallet. If I have a dollar, I will lend it to you.
9.I don't have any money. If I had a dollar, I would lend it to you.
10.I didn't have a dollar yesterday. If I had had a dollar yesterday, I would have lent it to you.
11. I didn't know it was your birthday yesterday. I wish you had told me. I would have got you present if I had known it was your birthday yesterday.
13.Why didn't you tell me when your plane was supposed to arrive? If you had told me, I would have picked